Valve grinder



Aug. 7, 1923.

A. LOVELESS VALVE GRINDER Filed Oct. 6, 1922 -2&

'INVEA/TOR A Lo M92 @6351,

,4 TTOR/VEYS Patented Aug. 7, 1923.

' F 1 E o I ALBERT LOVELESS, OF ABERDEEN, WASHINGTON.

VALVE GRINDER.

Application filed fictoherfi, 1922. Serial No. 592,855.

To all whom it may concern;

Be it known that 1', ALBERT Lovnnnss, a citizen of the United States, and a resident of Aberdeen, in the county of Gray Harbor and State of l/Vashington, have invented certain new and useful Improvements in Valve Grinders, of which the following is a specification.

This invention relates to an improvement in valve grinders of the type forming the subject-matter of my prior Patent No. 1,415,592, and the object of the invention is to provide a valve grinder of this character wherein more uniform and thorough grinding of the valve is had so that after the grinding operation proper seating and efficient action of the valves is insured.

Another object is to provide a valve grinder of this character which is of simple and durable construction, which may be readily appliedto the engine whose valves are to be ground and which may be operated without the exercise of special skill or of laborious effort.

Other objectsand advantages of the in vention reside in certain novel features of the construction, combination and arrange ment of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming part of this specification, and in which:

igure 1 is a view in elevation, showing the valve grinder in operation;

F igure2 is a perspective view of the valve grinder detached from the engine;

Figure 3 is a detail view, partly in vertical longitudinal section and partly in elevation, showing the manner in which the spindle is mounted and the means for actuating the same;

Figure 4 is a fragmentary view, in elevation, of the elements shown in Figure 3; and

Figure 5 is a view in transverse horizontal section on line 55 of Figure 4.

Referring to the drawings, the numeral designates an engine which includes as usual valves 11 having valve stems 12. During the valve grinding operation a coil spring 13 is arranged under the head of the valve 11 and encircling the stem 12 thereof, this coil spring being located in the valve chamber and serving to hold the valve 11 open and away from its seat.

The valve grinder includes a frame 15 comprising a U-shaped piece of resilient metal having a lower arm 16 provided with an opening 17 whereby the frame may be bolted as indicated at 18 in Figure l, to the engine block. The upper arm 19 of the frame 15 is provided with an extension 20 in the form ofa flat plate or bar of metal riveted, as at 21, to the upper arm 19 and further secured thereto by a band 22. VVhen the valve is being ground the extension 20 of the frame 15 overlies the valves and the outer end of this extension is formed with a bearing 23 in which a spindle 2 1 is mounted for rotary and axial movement. A hearing sleeve 25 is arranged on the spindle 2-1 and is interposed between the spindle and its bearing 23. This bearing sleeve 25 is constrained to partake of rotary motion of the spindle but is adjustable axially thereon, a portion of the spindle 24: being for this pur-, pose provided with flat faces 26 (see Figures 3 and 5) and the bore of the sleeve being of corresponding formation, there being nowever sufiicient clearance between the spindle and the sleeve to permit of longitudinal adjustment of the sleeve on the spindle. Means is provided for adjusting the sleeve 25 on the spindle 2e and for holding the sleeve in adjusted position thereon. Preferably this means comprises adjusting nuts 27 and 28 having threaded engagement with the spindle and abutting the opposite ends of the sleeve.

A crank arm 30 is rigidly secured to the upper end of the spindle 24: and is provided,

with an operating knob or handle 31, the crank and knob thus constituting means for rotating the spindle 24;.

Means isalso provided for imparting axial or vertical reciprocal movement to the spindle 2d as the same is rotated and this means preferably comprises a cam in the form of a ring and secured to the under side of the arm or extension 20 around the bearing 23, the cam 35 having a sinhous or wave-like cam face 35. A second cam 36 is provided and may take the form of a ring integrally formed with the sleeve 25. The cam 36 also includes a cam face 36* of sinuous or wave-like formation and corresponding of course in its formation to the formation of the cam face 35 of the cam 35. These cams 35 and 36 coact to periodically move the spindle downwardly as the same is rotated.

The lower end of the spindle 23 carries a disk 40 having pins ll depending therefrom, the disks and the pins togetherconstituting valve engaging means.

In operation the frame 15 is arranged on the engine block, as shown in Figure l with the arm or extension 20 thereof overlying the valve 11. The valve engaging means of the spindle 24: is then associated with the valve 11 and the operator then grasps the handle 31 and rotates the crank 30. This rotation of the crank turns the spindle 33 and consequently turns the valve 11. As the spindle 24l is turned it is periodically urged downwardly by the cams 35 and 36. As the spindle moves downwardly it carries the valve 11 with it and the valve 11 is thus periodically urged against its seat, the spring 13 or other means employed for holding the valve open being yieldable to permit of this periodical closing of the valve 11.

The grinding operation is preferably carried out with the aid of a grinding powder or compound and the alternate or periodical axial or closing movement of the valve as well as the rotary movement thereof provides for a thorough distribution of the grinding powder over the surfaces to be ground and thus insures an efficient grinding action. It is to be noted also that when the valve is completely closed and is moving. around against its seat the desired pressure between the surfaces to be ground is i had without binding and without distortion of any of the elements of the grinder, this being insured by virtue of the resiliency of the frame 15 which supports the valve grinding spindle. Moreover the spindle 23 may be adjusted vertically or axially by suitable manipulation of the nuts 27 or 28.

I claim: v

1. A valve grinder comprising, in combination with yieldable means for holding the valve open and away from its seat, a resilient frame having a bearing, a spindle mounted in the bearing for rotary and axial movement and having valve engaging means, a bearing sleeve interposed between the spindle and the bearing of the frame, said bearing sleeve being constrained to partake of the rotary movement of the spin dle while adjustable longitudinally thereon, means for holding the sleeve in adjusted position on the spindle, a cam carried by the frame, a cam carried by the sleeve and cooperable with the cam of the frame to effect axial movement of the spindle as the same is rotated and in such manner as to periodically close said valve and move it against its seat, and means for rotating said spindle.

2. A valve grinder, comprisin a resilient frame having a bearing, a spindle mounted in the bearing for rotary and axial movement and having valve engaging means, a bearing sleeve interposed between the spindle and the bearing of the frame, said bearing sleevebeing constrained to partake of the rotary movement of the spindle while adjustable longitudinally thereof, and cooperating means between the sleeve and the frame for effecting periodical axial movement of the spindle as the same is rotated.

3. A valve grinder comprising a frame having a bearing, bearing for rotary and axial movement and having valve engaging means, a bearin' sleeve interposed between the spindlean the bearing of the frame, said bearing sleeve being constrained to partake of the rotary movement of the spindle while adjustable longitudinally thereon, nuts threaded on the spindle and engageable with thesleeve for adjusting the same and holding it in adjusted position, and coacting cam rings carried by the sleeve and the frame respec= a spindle mounted in the tively for imparting periodical axial movement to the spindle as the same is rotated.

4. A valve grinder comprising in combination with yieldable means for holding the valve open and away from its seat, a frame, a spindle mounted on the frame for rotary and axial movement, said spindle having valve engaging means, means for rotating the spindle, and positive and unyielding means for imparting axial movement to the spindleas the same is rotated in such nianneras to periodically move the valve to closed position and against its seat, said positive and unyielding means including coacting' cam rings, one of said cam rings being connected to the frame and the other of said cam rings being connected to 

